Diloma coracina

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Diloma coracina
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Prosobranchia
Order: Archaeogastropoda
Superfamily: Trochacea
Family: Trochidae
Genus: Diloma
Species: D. coracina
Binomial name
Diloma coracina
(Philippi, 1851)
Synonyms

Trochus coracinus Philippi, 1851
Trochocochlea excavata Adams and Angus, 1864

Diloma coracina is a top shell, a species of marine gastropod mollusc in the family Trochidae, the top snails.

Contents

[edit] Distribution

This top shell is endemic to the North and South islands of New Zealand.

[edit] Habitat

This species is found on exposed open coast rock.

[edit] Shell description

The shell surface is almost smooth, at most showing weak spiral grooves and oblique indistinct corrugations. The columella is arcuate and smooth.

Coloration consists of zigzag stripes in reddish or purplish-brown on a white or yellowish ground. The broadly excavated base affords the animal maximum suction to withstand wave stress.

Maximum height is 12 mm, and width 12 mm.

[edit] References